Portable platform for rapid and indirect photometric determination of water in ethanol fuel samples

被引：0

作者：

Giordano, Gabriela Furlan ^{[1
,2
]}

Melo Ferreira, Danielle Cristhina ^{[1
]}

de Carvalho, Thiago Ribeiro ^{[2
]}

Silveira Vieira, Luis Carlos ^{[1
]}

de Oliveira Piazzetta, Maria Helena ^{[1
]}

Lima, Renato Sousa ^{[1
,2
]}

Gobbi, Angelo Luiz ^{[1
]}

机构：

[1] Ctr Nacl Pesquisa Energia & Mat, Lab Nacl Nanotecnol, Lab Microfabricao, Campinas, SP, Brazil

[2] Univ Estadual Campinas, Inst Quim, Campinas, SP, Brazil

来源：

ANALYTICAL METHODS | 2014年 / 6卷 / 23期

关键词：

ADULTERATION; SYSTEM; OXIDATION; METHANOL; ACETONE; IONS;

D O I：

10.1039/c4ay02255f

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

We have developed a simple, fast, portable, inexpensive, and indirect method for the determination of water in ethanol fuels. The addition of an excess amount of water is the most simple and common method of adulterating these fuels. Such procedure can adversely affect the performance of the vehicle. Our system uses a laboratory-made photometry device to monitor the formation of complexes between ethanol and cerium(IV). These reactions produce deep orange-red solutions. The limit of detection and the analytical sensitivity were estimated to be 0.22% v/v (water in ethanol) and 0.11 (% v/v)(-1), respectively. The developed platform was satisfactorily robust with respect to the changes in temperature and stability of the reagents during storage. The measurements were accurate at the 95% confidence level compared with data obtained by Karl Fischer titration.

引用

页码：9497 / 9502

页数：6

共 28 条

[1]

[Anonymous], ENERGY EC

[2] Time-resolved study of the oxidation of ethanol bycerium(IV) using combined Quick-XANES, UV-Vis, and Raman spectroscopies [J].

Briois, V ;

Lützenkirchen-Hecht, D ;

Villain, F ;

Fonda, E ;

Belin, S ;

Griesebock, B ;

Frahm, R .

JOURNAL OF PHYSICAL CHEMISTRY A, 2005, 109 (02) :320-329

[3] A copper interdigitated electrode and chemometrical tools used for the discrimination of the adulteration of ethanol fuel with water [J].

Bueno, Ligia ;

Paixao, Thiago R. L. C. .

TALANTA, 2011, 87 :210-215

[4] Determination of ethanol fuel adulteration by methanol using partial least-squares models based on Fourier transform techniques [J].

Carneiro, Helena S. P. ;

Medeiros, Alex R. B. ;

Oliveira, Flavia C. C. ;

Aguiar, Gustavo H. M. ;

Rubim, Joel C. ;

Suarez, Paulo A. Z. .

ENERGY & FUELS, 2008, 22 (04) :2767-2770

[5]

Cho S, 2005, B KOREAN CHEM SOC, V26, P115

[6] Validation spreadsheet: A new tool for estimating the analytical figures of merit for the validation of univariate methods [J].

de Lima Ribeiro, Fabiana Alves ;

Castro Ferreira, Marcia Miguel ;

Morano, Sandra Campilongo ;

da Silva, Lucimara Rodrigues ;

Schneider, Rene Peter .

QUIMICA NOVA, 2008, 31 (01) :164-171

[7] Biofuels and carbon management [J].

DeCicco, John M. .

CLIMATIC CHANGE, 2012, 111 (3-4) :627-640

[8] DETERMINATION OF WATER IN ETHANOL AND ACETONE BY DIRECT INJECTION ENTHALPIMETRY BASED ON THE HEAT OF DILUTION [J].

DEOLIVEIRA, WA ;

PASQUINI, C .

TALANTA, 1984, 31 (01) :82-84

[9]

Doyle M. P. J., 1974, CHEM ED, V51, P2

[10] Quantifying Colorimetric Assays in Paper-Based Microfluidic Devices by Measuring the Transmission of Light through Paper [J].

Ellerbee, Audrey K. ;

Phillips, Scott T. ;

Siegel, Adam C. ;

Mirica, Katherine A. ;

Martinez, Andres W. ;

Striehl, Pierre ;

Jain, Nina ;

Prentiss, Mara ;

Whitesides, George M. .

ANALYTICAL CHEMISTRY, 2009, 81 (20) :8447-8452

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